Magnetic responses of a high-T-c semi-reversible YBCO superconductor


CELEBI S. , OZTURK A. , Cevik U.

JOURNAL OF ALLOYS AND COMPOUNDS, vol.288, pp.249-254, 1999 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 288
  • Publication Date: 1999
  • Doi Number: 10.1016/s0925-8388(99)00115-2
  • Title of Journal : JOURNAL OF ALLOYS AND COMPOUNDS
  • Page Numbers: pp.249-254
  • Keywords: a.c. susceptibility, critical current density, critical state model, high-T-c superconductor, YBCO, HIGH-TEMPERATURE SUPERCONDUCTORS, II SUPERCONDUCTORS, AC SUSCEPTIBILITY, SURFACE BARRIERS, LOSSES, IRREVERSIBILITY, MODEL

Abstract

We report the magnetic responses of a YBCO superconducting sample prepared by solid-state reaction method, in terms of d.c. magnetization, and a.c. susceptibility. Hysteresis loops have been analyzed in the framework of critical state model including the Meissner current. The critical current as a function of temperature and the volume fraction of the grains have been estimated from the a.c. susceptibility data. The zero resistance temperature and diamagnetic onset temperature were found to be 90 and 91.5 K respectively. (C) 1999 Elsevier Science S.A. All rights reserved.